I am 24 and would much rather have a great dinner than go out to a club until 5 am. Its just who I am. My DBF is older, my friends are all older, so I understand where you're coming from. Theres nothing wrong with dating older men, I always have but if there is no spark why get any deeper in a relationship that you don't seem you want to be in. You said you don't want to hurt him, if he's ready to settle and you're not, wasting a few more months will hurt both of you more.
Enjoy yourself, date around (not "get" around

) above all else have fun! You are only young once. (This means doing what you find to be fun, cooking, movies, plays- do it all!)
Be careful, if you continue- you'll be jumping into a ready made family, that you're not sure that you want. There is a kid involved, so it'll get a bit more complicated later on.